Plug-in electrical unit



May 2, 1956) c. E. COHN PLUG-IN ELECTRICAL UNIT Filed NOV. 28, 1947 Patented May 2, 1950 STAT-ES o e-Fr t 2,506,065 BLEJGJNEL WAP NIT l s-F e 1 a hmeesa ApplicationNovemhen'28, 1947, Serial No. 788,609

6 Claims, (Cl.

This invention relates to plug-in electrical de; r tes. and, i mer PfiflEl-llhfifi: ce n d" wit dr or metallic. ect er t at ma ie-s tit eq r es me as. eetl et athe W 9 at We: e nleeemee Q: v u fi t re ifier w t a 3 5 4 t e dry disc a m ta lic t me tates ie were e ee ie nst ments. te im v cans a' t e nc u in n mam? Q ri l ng, e i bun' i ss ie-w q det ne e T aeene el obi-est th st e-W 9 i a he 10:- visi y un t s me are e tifie sai h? qty." ties in m a c. yre thes s eni m a rot xid 1F 9 l ha e. et wh ch b we stitii ec ree e tiot resume ube rectifier, he sememannet s the va m ube Bet i: fier were replaced by another vacuum tube recti; fier. without theneedroff any tedious operation, re-wiring, extra mountings, soldering, etc.

The replacement of avacuum tube rectifier with a metallic. rectifier is sometimes desirablein various electronic instruments, such as rad ipreceivers, for example, because it permits instant starting. Thede'ticeot inyinvention is superior in other. ways to the usual, vacuum tube rectifiers ue t he p a ea at t strueii which-make t more new.

A re e d embpdimente hie ntion. i illustr t d: n he accompecri e awing. n which:

Fig.1 isa v rt ca 1on tu inals ec n e el y thr u h the embodiment Fig. 12, is across section along the line 2- 2,- of Fig. 1.

Fig. 3 is a top plan view of the embodiment partly cut away.

Referring with more particularity to the drawing in which like numerals designate like parts, the embodiment illustrated comprises an inner cylindrical cup H of porcelain or other suitable ceramic material coaxially disposed within an outer cylinder [2 of aluminum, copper, steel, or other suitable metal. The cup I I is used not only to house the internal electrical components, but to insulate them against short circuits and withstand the heat developed by the components.

The diameter of the cylinder i2 is substantially greater than that of the cup I I so as to provide a space l3 therebetween. The cylinder I2 is also provided with perforations M to freely admit circulating air, all of which contribute to the ability of the device to dissipate rapidly heat from the cup H.

The upper end of the cylinder I2 is bent inwardly to form a flange l5 which extends and is 55 attached to thecnpfll T'Ihelower. section It of cylinder -|.2Hta" 10 low ,bottomof cup I 'I,

base. member l1. similar to tube. The, lower, e s steered the' "Z means of a i langed annu bracket 18. havee ts tatt l se t ea t les-cured b lu n or e hammer he. we 1. n ts.

ihie the tea-Mi ten, sesam v p d, a I at ie ewdesite i dis or? tetetell atheism a d f a Tire/rectifier ele #1 w r t e u inst ad if e r-e l flegs zfi and 2 6 se-v Y A K v M The terminals- J nd, tsoiate eep te lement are el s lvconnected to leads or conductors 29and3fl which, sweet t rweli apertures. and 3. n e mile it-We l1- edd t pnal; 35-, t5; nd 3 a e. als provided htwshran ttreatlt 8 t9? a d; it". o the base of the cup for connection to resistors placed within the cup. The leads 33 and 34 are connected to the ends of a resistor 4|, and the terminals 35 and 36 are connected to the ends of a resistor 42. The function of one of the resistors, say resistor 4|, is to reduce line voltage, while the other resistor acts as a shunt to obtain the proper voltage for a pilot or julot lamp in a radio receiver, for example. Most radio rectifiers, for example, of the vacuum tube type include elements to provide for one or both of these functions. Accordingly, these resistors are an integral part of the device illustrated to render it an exact equivalent of the usual type of vacuum tube rectifier encountered in the radio field.

The resistors 4| and 42 are supported by threading each one through a pair of apertures 43 and 44, respectively, in the disc 22 before attaching them to their respective terminals in the base of the cup H. The leads 29, 30, 33, 35, 35, and 36 are connected to prong terminals 45, 46, 41, 48, 49, and 50, the latter being secured to and projecting from the bottom of the base member 17. Additional prong terminals and leads, such as the terminal 5i and lead 52 and corresponding aperture 53, may be provided for any additional element, or elements, desired in the device.

From the above description it may be seen that this invention embraces devices which are as convenient and simple to use as the ordinary vacuum tubes. By the use of proper materials the construction of these devices obviates dimculties heretofore encountered and results in a sturdy and long lasting unit. Rectifiers made in accordance with this invention can readily be substituted for the usual type of vacuum tube rectifier, and is superior thereto in many Ways.

I claim:

1. An electrical device comprising as a unit a cup of an electrical insulating material, a heat conducting shell surrounding said cup and being radially spaced therefrom, means for securing said shell to said cup, electrical elements within said cup, said elements comprising a dry disc rectifier and electrical resistors, and electrical conductors connected to said elements and projecting from the bottom of the cup.

2. An electrical device comprising as a unit a cup of an electrical insulating material, a heat conducting shell surrounding said cup and being radially spaced therefrom, means for securing said shell to said cup, electrical elements within said cup, said elements comprising a dry disc rectifier and electrical resistors, a disc at the top of said cup for supporting said resistors, and electrical conductors connected to said elements and projecting from the bottom of the cup. 7

3. An electrical device comprising as a unit a cup of an electrical insulating material, a heat conducting shell surrounding said cup and being radially spaced therefrom, means for securing said shell to said cup, electrical elements Within said cup, said elements comprising a dry disc rectifier and electrical resistors, a disc of an electrical insulating material at the top of said cup, said disc having apertures through which said resistors are threaded and thereby supported, and electrical conductors connected to said elements and projectingfrom the bottom of the cup.

4. An electrical device comprising as a unit a cup of an electrical insulating material, a heat conducting shell surrounding said cup and being radially spaced therefrom, means for securing LIL said shell to said cup, electrical elements within said cup, said elements comprising a selenium rectifier, a line voltage dropping resistor and a shunt resistor, said resistors extending longitudinally Within the cup, a plate at the top of said cup, means for supporting said resistors on said plate, and electrical conductors connected to said elements and projecting from the bottom of the cup.

5. An electrical device comprising as a unit a cup of an electrical insulating materiaLa heat conducting shell surrounding said cup and being radially spaced therefrom, means for securing said shell to said cup, an electrical element within v the cup, a disc at the top of said cup for supporting said element and electrical conductors connected to and projecting from the bottom of the cup, said disc being of an electrical insulating material and having a serrated periphery in frictional engagement with the inner face of said cup.

6. An article of manufacture comprising a cup of an electrical insulating material, a metallic shell surrounding said cup, said shell being radially spaced therefrom, means for securing said shell to said cup, a selenium rectifier and at least one electrical resistor within said cup, 2. disc of an electrical insulating material at the top of said cup for supporting said resistor, electrical conductors connected to said rectifier and resistor, said conductors projecting from the bottom of the cup, a base member secured to the bottom of said shell, a plurality of electrical prong terminals secured to said base and projecting from the bottom thereof, each of said terminals being secured to one of said conduc-' tors.

CHARLES E. COHN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Triplett Nov. 21, 1939 

